Hi! My 2017 Chevy Z71 Midnight Edition Tahoe (purchased in July 2017, 14,200 miles already!) has been great so far, but I can't get used to the way the transmission shifts - it seems to shift at weird times (versus my old 2010 Chevy suburban) and it seems to shift hard (I especially notice this around 75 - 83 mph) Does anyone else notice this?